# Copyright 2016 by Cloudsoft Corporation Limited
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

##
# Bash tab completion for the Apache Brooklyn 'br' CLI tool
##

##
# Handle slashes in filenames after directories
##
slashes() {
    if [ ${#COMPREPLY[@]} = 1 ]; then
        [ -d "$COMPREPLY" ] && last=/
        COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
    else
        for ((i=0; i < ${#COMPREPLY[@]}; i++)); do
           [ -d "${COMPREPLY[$i]}" ] && COMPREPLY[$i]=${COMPREPLY[$i]}/
        done
    fi
}

##
# Recursive list of entities in an application
##
entities() {
    entities=$(br application $1 entity | tail -n +2 | sed -e "s/ *[a-zA-Z][a-zA-Z0-9_.]* *$//")
    if [[ "${entities}" ]] ; then
        echo "${entities}" | while read e n; do
            echo "${e}"
            echo "${n}" | grep -v " "
            entitychildren $1 ${e}
        done
    fi
}
entitychildren() {
    children=$(br application $1 entity --children $2 | tail -n +2 | sed -e "s/ *[a-zA-Z][a-zA-Z0-9_.]* *$//")
    if [[ "${children}" ]] ; then
        echo "${children}" | while read e n ; do
            echo "${e}"
            echo "${n}" | grep -v " "
            entitychildren $1 ${e}
        done
    fi
}

##
# Completion function
##
_br() {
    local cur prev last=' ' state appid entityid
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"

    # Commands available for each state
    initial="access add-catalog application catalog deploy locations login version help"
    application="access add-children config delete effector entity invoke policy rename restart sensor set spec start stop"
    entity="access add-children config delete effector invoke policy rename restart sensor set spec start stop"
    catalog="add delete list show"
    cataloglist="application entity location policy"

    # Determine command state
    if [[ ${COMP_CWORD} == 1 ]] ; then
        state=initial
    elif [[ "${COMP_WORDS[1]}" == "application" && ${COMP_CWORD} == 2 ]] ; then
        state=app
    elif [[ "${COMP_WORDS[1]}" == "deploy" && ${COMP_CWORD} == 2 ]] ; then
        state=deploy
    elif [[ "${COMP_WORDS[1]}" == "add-catalog" && ${COMP_CWORD} == 2 ]] ; then
        state=add-catalog
    elif [[ "${COMP_WORDS[1]}" == "catalog" && ${COMP_CWORD} == 2 ]] ; then
        state=catalog
    elif [[ "${COMP_WORDS[1]}" == "catalog" && "${COMP_WORDS[2]}" == "list" && ${COMP_CWORD} == 3 ]] ; then
        state=cataloglist
    elif [[ "${COMP_WORDS[1]}" == "catalog" && "${COMP_WORDS[2]}" == "show" && ${COMP_CWORD} == 3 ]] ; then
        state=cataloglist
    elif [[ "${COMP_WORDS[1]}" == "catalog" && "${COMP_WORDS[2]}" == "add" && ${COMP_CWORD} == 3 ]] ; then
        state=add-catalog
    elif [[ "${COMP_WORDS[1]}" == "application" && ${COMP_CWORD} == 3 ]] ; then
        state=appid
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "entity" && ${COMP_CWORD} == 4 ]] ; then
        state=entity
        appid=${COMP_WORDS[2]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "sensor" && ${COMP_CWORD} == 4 ]] ; then
        state=appsensor
        appid=${COMP_WORDS[2]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "effector" && ${COMP_CWORD} == 4 ]] ; then
        state=appeffector
        appid=${COMP_WORDS[2]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "config" && ${COMP_CWORD} == 4 ]] ; then
        state=appconfig
        appid=${COMP_WORDS[2]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "entity" && ${COMP_CWORD} == 5 ]] ; then
        state=entityid
        appid=${COMP_WORDS[2]}
        entityid=${COMP_WORDS[4]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "entity" && "${COMP_WORDS[5]}" == "sensor" && ${COMP_CWORD} == 6 ]] ; then
        state=entitysensor
        appid=${COMP_WORDS[2]}
        entityid=${COMP_WORDS[4]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "entity" && "${COMP_WORDS[5]}" == "effector" && ${COMP_CWORD} == 6 ]] ; then
        state=entityeffector
        appid=${COMP_WORDS[2]}
        entityid=${COMP_WORDS[4]}
    elif [[ "${COMP_WORDS[1]}" == "application" && "${COMP_WORDS[3]}" == "entity" && "${COMP_WORDS[5]}" == "config" && ${COMP_CWORD} == 6 ]] ; then
        state=entityconfig
        appid=${COMP_WORDS[2]}
        entityid=${COMP_WORDS[4]}
    fi

    # Generate completions for current state
    case "${state}" in
        initial)
            COMPREPLY=( $(compgen -W "${initial}" -- "${cur}") ) || return 1
            COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            ;;
        app)
            local applist=$(br application | tail -n +2 | awk '{ print $1; }')
            if [[ "${applist}" ]] ; then
                COMPREPLY=( $(compgen -W "${applist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        appid)
            COMPREPLY=( $(compgen -W "${application}" -- "${cur}") ) || return 1
            COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            ;;
        appsensor)
            local sensorlist=$(br application ${appid} sensor | tail -n +2 | awk '{ print $1; }')
            if [[ "${sensorlist}" ]] ; then
                COMPREPLY=( $(compgen -W "${sensorlist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        appeffector)
            local effectorlist=$(br application ${appid} effector | tail -n +2 | awk '{ print $1; }')
            if [[ "${effectorlist}" ]] ; then
                COMPREPLY=( $(compgen -W "${effectorlist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        appconfig)
            local configlist=$(br application ${appid} config | tail -n +2 | awk '{ print $1; }')
            if [[ "${configlist}" ]] ; then
                COMPREPLY=( $(compgen -W "${configlist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        catalog)
            COMPREPLY=( $(compgen -W "${catalog}" -- "${cur}") ) || return 1
            COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            ;;
        cataloglist)
            COMPREPLY=( $(compgen -W "${cataloglist}" -- "${cur}") ) || return 1
            COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            ;;
        entity)
            local entitylist=$(entities ${appid})
            if [[ "${entitylist}" ]] ; then
                COMPREPLY=( $(compgen -W "${entitylist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        entityid)
            COMPREPLY=( $(compgen -W "${entity}" -- "${cur}") ) || return 1
            COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            ;;
        entitysensor)
            local sensorlist=$(br application ${appid} entity ${entityid} sensor | tail -n +2 | awk '{ print $1; }')
            if [[ "${sensorlist}" ]] ; then
                COMPREPLY=( $(compgen -W "${sensorlist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        entityeffector)
            local effectorlist=$(br application ${appid} entity ${entityid} effector | tail -n +2 | awk '{ print $1; }')
            if [[ "${effectorlist}" ]] ; then
                COMPREPLY=( $(compgen -W "${effectorlist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        entityconfig)
            local configlist=$(br application ${appid} entity ${entityid} config | tail -n +2 | awk '{ print $1; }')
            if [[ "${configlist}" ]] ; then
                COMPREPLY=( $(compgen -W "${configlist}" -- "${cur}") ) || return 1
                COMPREPLY=$(printf %q%s "$COMPREPLY" "$last")
            fi
            ;;
        deploy)
            COMPREPLY=( $(compgen -o plusdirs -f -X '!*.yaml' -- "${cur}") )
            slashes
            ;;
        add-catalog)
            COMPREPLY=( $(compgen -o plusdirs -f -X '!*.bom' -- "${cur}") )
            slashes
            ;;
    esac
}

complete -o nospace -F _br br

# vim:ts=4:sw=4:ft=sh: